Examlex
Natural levees block yazoo streams from joining the main river on a flood plain.
Iris
The colored part of the eye surrounding the pupil, controlling the amount of light entering the eye by adjusting the size of the pupil.
Sclera
The white, outer layer of the eyeball, providing protection and form.
Ciliary Muscle
Smooth muscle in the ciliary body of the eye.
Retina
is the light-sensitive layer at the back of the eye that contains photoreceptor cells, which convert light into neural signals for visual recognition.
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Q173: All parallels are 360° in length.